Optical lens

An optical lens and lens technology, applied in the field of optical lenses, can solve the problems of low imaging quality, small field of view, low definition, etc., and achieve the effect of high imaging quality, large field of view, and high definition

Active Publication Date: 2022-06-28
JIANGXI LIANCHUANG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing wide-angle vehicle-mounted lenses can basically meet the basic needs of large-field-of-view vehicle-mounted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] see figure 1 , which is a schematic structural diagram of the optical lens provided in Embodiment 1 of the present invention. The optical lens sequentially includes from the object side to the imaging plane along the optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens Lens L4, diaphragm ST, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, filter G1 and protective glass G2.

[0125] The first lens L1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave;

[0126] The second lens L2 has negative refractive power, the object side S3 is convex, and the image side S4 is concave;

[0127] The third lens L3 has positive refractive power, the object side S5 is concave, and the image side S6 is convex;

[0128] The fourth lens L4 has positive refractive power, the object side S7 is concave, and the image side S8 is convex;

[0129] aperture ST;

[0130] The fifth lens L5 has positive refractive...

Embodiment 2

[0152] see Figure 8 , which is a schematic diagram of the structure of the optical lens provided in Embodiment 2 of the present invention. The optical lens sequentially includes from the object side to the imaging plane along the optical axis: a first lens L1, a second lens L2, a third lens L3, a fourth lens Lens L4, diaphragm ST, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, filter G1 and protective glass G2.

[0153] The first lens L1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave;

[0154] The second lens L2 has negative refractive power, the object side S3 is convex, and the image side S4 is concave;

[0155] The third lens L3 has positive refractive power, the object side S5 is concave, and the image side S6 is convex;

[0156] The fourth lens L4 has positive refractive power, the object side S7 is concave, and the image side S8 is convex;

[0157] aperture ST;

[0158] The fifth lens L5 has a positive r...

Embodiment 3

[0177] see Figure 15 , which is a schematic structural diagram of the optical lens provided in Embodiment 3 of the present invention. The optical lens includes a first lens L1, a second lens L2, a third lens L3, a fourth lens L1, a second lens L2, a fourth lens L3, and a fourth lens along the optical axis from the object side to the imaging plane. Lens L4, diaphragm ST, fifth lens L5, sixth lens L6, seventh lens L7, eighth lens L8, filter G1 and protective glass G2.

[0178] The first lens L1 has negative refractive power, the object side S1 is convex, and the image side S2 is concave;

[0179] The second lens L2 has negative refractive power, the object side S3 is convex, and the image side S4 is concave;

[0180] The third lens L3 has positive refractive power, the object side S5 is concave, and the image side S6 is convex;

[0181] The fourth lens L4 has positive refractive power, the object side S7 is convex, and the image side S8 is concave;

[0182] aperture ST;

[...

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Abstract

The invention provides an optical lens, which comprises eight lenses in sequence from an object side to an imaging surface along an optical axis: a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power and a fifth lens with negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the object side surface of the third lens is a concave surface, and the image side surface of the third lens is a convex surface; the fourth lens has focal power; a diaphragm; the fifth lens has positive focal power, and the object side surface of the fifth lens is a convex surface; the sixth lens has positive focal power, and the object side surface and the image side surface of the sixth lens are convex surfaces; the seventh lens has negative focal power, and the object side surface of the seventh lens is a concave surface; the object side surface and the image side surface of the eighth lens are convex surfaces; the effective focal length f of the optical lens and the focal length f2 of the second lens meet the condition that f2/f is larger than-25 and smaller than-4.0. The optical lens realizes the effects of large field angle, large aperture, high definition and high imaging quality.

Description

technical field [0001] The present invention relates to the technical field of imaging lenses, in particular to an optical lens. Background technique [0002] With the rapid development of advanced driver assistance systems (ADAS), vehicle cameras have a wider range of applications and development. These include dash cams, automatic parking, forward collision warning (FCW), lane departure warning (LDW), pedestrian detection warning (PCW), and more. Although the existing wide-angle vehicle lens can basically meet the basic needs of the large field of view vehicle lens, there are still defects such as too small field of view, too small aperture, and low definition and low image quality. SUMMARY OF THE INVENTION [0003] In view of the above problems, the purpose of the present invention is to provide an optical lens, which has the advantages of a large angle of view, a large aperture, high definition and high imaging quality. [0004] For achieving the above object, techni...

Claims

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Application Information

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IPC IPC(8): G02B13/06G02B13/18
CPCG02B13/0045G02B13/06
Inventor 魏文哲王克民
Owner JIANGXI LIANCHUANG ELECTRONICS CO LTD
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